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the meridian system
He is deeply involved in the study of the meridian system.
coordinate system
We use this coordinate system to locate the position of an object.
inertial frame of reference
In physics, the inertial frame of reference is a very important concept.
Kyūjitai form of 体系: system; organization
This system is very complex.
paleoecology
Paleoecology is a field of study that investigates the relationship between past organisms and their environment.
Kyūjitai form of 古生態学: paleoecology
He is an expert in paleoecology, pouring his passion into studying past ecosystems.
Synonym of 天動説 (tendōsetsu, “geocentrism”)
He believes in the geocentric theory.
global warming
Global warming is a big issue that affects all of us.
a terrestrial planet
A terrestrial planet may have an environment similar to Earth.
(geology, physics) geophysics
He is an expert in geophysics.
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